Assembly for pressing the upper end or lower margins of a container



April 18, 1961 H. WELSC PRESSING u ASSEMBLY FOR THE R 0R LOW MARGINS OF A CONTAIN Filed Oct. 8, 1956 2 Sheets-Sheet l April 18, 1961 H. WELSCH 2,979,994

ASSEMBLY FOR PRESSING THE UPPER END OR LOWER MARGINS OF A CONTAINER 2 sheets-sheet 2 Filed Oct. 8, 1956 ASSEMBLY FOR PRESSING THE UPPER END OR l LOWER MARGINS OF A CONTAINER Hans Welsch, Dusseldorf, Germany, assignor to Jagenberg-Werke Akt. Ges., Dusseldorf, Germany Filed Oct. 8, 1956, Ser. No. 614,693 Claims priority, application Germany Nov. 11, 1955 8 Claims. (Cl. 93-36) body in the nature of a U-shaped connection with such component parts being pressed together to provide a tight closure.

To effect an adequate closure,'the pressure must be uniformly distributed throughout the entire surface to be pressed and of the workpiece so that all of the component parts are subjected to the same pressure. The generation of a pressure acting upon the entire surface en- United States Patent counters difficulties if the tool adjacent to the two cooperable pressing instrumentalities is of different thickness, which can be brought about by the overlapping lengthwise edges of the container blank secured together to constitute the article. Adjacent to the overlapping zone, the uniformly acting pressure is of particular importance as otherwise it is not possible to effect atight juncture of the container body with respect to the closure element. In order to insure a pressure adjacent such overlapping parts which is uniformly distributed throughout the entire edge of the container, pressing jaws have been used which in order to cooperate properly with the unevenness brought about by the overlapping are offset in the zone of the overlap. The employment of such pressing jaws is satisfactory provided the overlapped zone is always at the same location. During manufacture of such a container the body can be positioned in the pressing'assem blies in such a fashion that the overlapping seam can be positioned in one instance on the right hand side and in another instance on the left hand side of the article to be pressed and by using a pressing jaw which is offset in one region does not necessarily mean that aprop'er pressing operation will be attained if such overlapped region is not adjacent to the corresponding recess'in the pressing jaw. Accordingly, one of the salient objects of this-invention -is.to overcome the above and other objectionable features now present in the art.

Broadly, in accordance with the invention, the pressing jaw located adjacent to the possible positions of the overmember being displaceable solely perpendicularly. One or the other of the lateral members can be positioned adjacent the overlapped zone and is movable out of the pressure plane determined by the front face of the central member whereas the other lateral member is moved by the perpendicular displacement of the central member in the direction of pressure into the pressure plane. To provide for such movements, the adjacent faces of the respective lateral members and the central member are planar whereas theopposite faces of the lateral members are inclined to cooperate with the inclined walls of the recess. 7

In a further embodiment, the recess in the pressing jaw is rectangular and the lateral members cooperate at their inner faces with the free ends of a tiltable lever movable about a fixed fulcrum.

In yet a further form, the lateral members are displaceablerelative to one another in the direction of application of pressure by means of a fluid or a ball-hydraulic assemblage.

For performing the pressing operation either an inner anvil of predetermined outer contour and outer movable pressing jaws or an outer fixed counter element and an inner plungerincluding a plurality of jaws capable of being moved outwardly are disposed opposite the container body on all sides thereof with such component parts cooperable to complete the pressing operation.

Further, and more specific objects of the invention will become more readily apparent from the following description and attached drawings having reference to 'constructional examples of the several forms of the assembly, In the drawings, Figure 1 is a horizontal sectional view, partly broken away, of one form of the invention,

Figure 2 is a fragmentary horizontal sectional view of a portion of the assembly showing the component parts of one movable jaw in a different operating position thari that shown in Figure 1, V e

Figure 3 is a vertical sectional view taken along the line 3 3 of Figure 1 looking in the direction of the blank which is shaped to 1 form the desired article and has an overlapping longitudinal seam 2. The upper and lower openings or ends of the article are to be closed by closure parts 3. As can be seen in Figure 3, theclosure lapped zone is provided with members which are displacesure plane whereas the other 'in'ember is moved into the pleasure plane; a

Morespecifically;the'movable jaw is provided with}.

frustoconical recesstherein in which is ,movably mount-i" ed'acentrally located member' and two lateral rnernberslwithethe front rmofithe central member being disposed .in thepressure plane and with such" central.

part 3 is formed with spaced flanges :4 which embrace the upper and/or the lower margin of the body 1 so asto define a U-shaped connection with the component parts being pressed together. a I

The pressing assembly includes a stationary or fixed inner anvil'or mandrel 5, the outer contour of which conforms to the inner opening of the article to be formed. The container body 1 can be positioned on the anvi1 5 in any suitablernanner and the anvil functions as an impact base for'movable jaws 6, 6a, 6b, and 7, which jaws cooperate with the respective sides of'the body 1 with the jaw 7 being arranged oppositethe side including the seam 2. The movable jaws move cyclicly ini the' direction of the anvil 5 by any suitable means and injso, doing exert the necessary pressure on the materialfposi tioned between anvil and'the jaws. 1 Y Referring again to F'g ure 1 willbe noted that the. jaw. 7includes a guide 8 provided witha. frusto-conical, recessda within which are 'movably mounted pressuren.

the inclined wall of the recess 8a.

applying members 9 and 11 and a central or intermediate pressure-applying member 10. The central member 10 is located outside of the possible position of the overlapped seam 2 with the rear face of such member supported by the base of the recess 8a while the front face is disposed in the pressure plane. The adjacent faces of the lateral pressure-applying members 9 and 11 and the intermediate pressureapplying member 10 are planar whereas the opposite or free faces of the lateral members 9 and 11 are inclined at 12 to cooperate with By virtue of this arrangement, the lateral member 9 or 11 which is located adjacent the seam 2 can move out of the pressure plane determined by the front face of the intermediate member 10 and a slight lateral movement is imparted to the inter,- mediate member 10, which movement will cause the other of the lateral members to be moved in the direction of pressure into the pressure plane.

In order to accomplish such ends, it will be seen that a pin 13 extends through apertures or bores 14, 15, and 16 provided in the members 10, 9 and 11 respectively with the bore 14 being so dimensioned that the intermediate member 16 can only move laterally. As perhaps best shown in Figures 1 and 3, the bores 15 and 16 are in the nature of elongated slots, which slots in addition to allowing lateral movement of the members 9 and 11 will also permit movement of such members in the direction of the pressure application. 7

Figure 1 shows the relationship of the members 9, l and 11 when the lateral member 9 is positioned opposite the seam 2 whereas Figure 2 shows the relationship when the lateral member 11 is disposed opposite the seam 2.

In Figure 4 which illustrates a further form of the invention, it will be seen that guide 8 is formed with a recess 8" therein and the rear faces of lateral members W and 11' cooperate with the end zones of a lever 17 turnable about a fixed fulcrum. In this form, such lever transmits the movement of one member to the other member while the intermediate member 10 is fixedly arranged on the guide 8' or is a part of the guide 8.

The embodiments illustrated in Figures and 6 are along the lines of that of Figure 4 except that the movement of one of the lateral members can be imparted to the other through the medium of a ball-hydraulic assembly 18 or a body of oil 18' respectively. Thus, the interior of the guide defines a reservoir.

It will be appreciated from the foregoing description that with the provision of the laterally and longitudinally displaceable members 9 and ,11 it is possible to exert the desired pressure 'on the side of the container having the overlapping seam regardless of the particular location of the seam as the jaw adapts itself to the particular side in question. The assemblage is simple both as to structural detail and operation and can be readily and easily manufactured.

What is claimed is:

1. An assembly for pressing the upper and/or lower margins of a container body having a side wall including portions which overlap to provide a longitudinal seam for the body, whereby the side wall is thicker on one side of the seam than on the other, such assembly including an'impact receiving element and a pressure jaw assembly movable toward the impact receiving element and having a single recess therein facing said impact receiving element, with the impact receiving element and jaw assembly being associated with the inner and outer faces of the container side wall portion having the overlapped longitudinal seam, said pressure jaw assembly including a first member within said recess and fixed as regards the direction of movement of the assembly and having an exposed face that defines a pressing plane and at least two other pressure applying members within saidr'ecess,

one on each'side of said first member, each offsaidlast mentioned pressure applying members also having an exposed pressing face, means mounting said other pressure-applying members for displacement relative to one another and relative to said first member in the direction toward and away from said impact receiving element and further means operatively associated with said two other pressure-applying members for transmitting movement of one pressure-applying member to the other pressureapplying member responsive to engagement of said one of said other two pressure-applying members with the thicker container side wall portion at the location of the overlapped seam so that said one pressure-applying member moves away from the impact receiving element and the other pressure-applying member moves toward the impact receiving element while said first member remains fixed as regards the direction of movement of the assembly.

2. An assembly as defined in claim 1, wherein said mounting means and further means includes a lever mounted within the jaw assembly behind said members for movement about a fixed fulcrum and said other two members engaging the free ends of the lever.

3. An assembly as defined in claim 1 wherein said mounting means and further means includes a reservoir within the jaw and a fluid filling the jaw assembly behin said members.

4. An assembly as defined in claim 1, wherein said mounting means and further means includes a reservoir within the jaw assembly behind said members and a plurality of balls and fluid filling the reservoir. 7

5. An assembly for pressing the upper and/or lower margins of a container body having a side wall including portions which overlap to provide a longitudinal seam for the body whereby the side wall is thicker on one side of the seam than on the other, said assembly including a fixedimpact-receiving element and a jaw means movable toward and away from the impact-receiving element with the impact-receiving element and jaw means being associated with the inner and outer sides of the container side wall portions having the overlapped longitudinal seam, said jaw means having a single frusto-conical recess therein including a base. extending transversely of the direction of movement of the jaw means and disposed parallel to said container side wall portions, said recess facing said impact-receiving element, two pressure-applying members mounted within the recess and displaceable relative to one another in the direction of movement of said jaw means, each of said pressure-applying members having an end portion corresponding in taper to the taper of the recess, each of said pressure applying members also having an exposed pressing face, pressing means intermediate'said members and fixed relative to the recess as regards the direction of movement of said jaw means, said last-mentioned pressing means having an exposed end face defining a pressing plane and a rear face engaging the base of the recess, and said pressing means being movable laterally of the direction of movement of the recess so that when one of said pressure applying members is positioned opposite the overlapped longitudinal seam, said one member is moved rearwardly and out of the pressure plane defined by the end face of said pressing means and laterally of the recess whereby said press ing means moves laterally to move said other pressure applying member laterally and outwardly to dispose its pressing face in the pressing plane due to the cooperation of the tapered end portions of the respective pres sure-applying members with the tapered wall of the recess. r

6. An assembly for pressing the upper and/or lower margins of a container bodyhaving a side wallincluding portions which overlap to provide a longitudinal seam for the body whereby the side wall is thicker on; one side of the seam than on" the other, such assembly, including anitnpact receivingelement and a movable jaw meansi that is movable toward and away from the impact receiy ing element, with the, impact jreceiving element and jaw,

means being respectively associated with the inner and V apropos outer sides of the container side wall portion having the overlapped longitudinal seam, said jaw means having a single frusto-conical recess therein, said recess facing said impact receiving element, two pressure applying members mounted within the recess and displaceable relative to one anoher in the direction of application of pressure of said jaw means, each of said pressure applying members having an exposed pressing face and an end portion that corresponds in taper to the taper of the recess, pressing means intermediate said members and having an end face defining a pressing plane, each of said pressure applying members having a slot therethrough that is elongated in the direction of application of pressure, said pressing means having a bore therethrough extending transversely of the direction of the application of pressure, and pin means passing through said slot and said bore and secured to said movable jaw means so that when one of said pressure applying members is positioned opposite the overlapped longitudinal seam, said one pressure applying member is moved rearwardly and out of the pressing plane defined by the end face of said pressing means and laterally of the recess whereby said pressing means moves laterally to'move the other pressure applying member laterally and outwardly into the pressing plane due to the cooperation of the tapered end portionsof the respective pressure-applying members with the tapered wall of the recess.

'7. In apparatus for applying pressure to the upper or her, and means mounting said last mentioned pressure applying members for movement relative to each other in the direction of movement of the assembly.

8. In apparatus for applying pressure to the upper or lower rim of a container made of paper, cardboard or the like carton-forming material, and which container includes a longitudinally extending overlapped seam, a jaw assembly having opposite lateral sides, said jaw as sembly being adapted to be moved toward and away from a supported container, said jaw assembly including a first pressure-applying member located intermediate the opposite lateral sides of the assembly and rigidly mounted with respect to the direction of movement of the assembly, said first pressure-applying member having a pressing face, at least two other pressure-applying members carried by said assembly, one on each side of said pressure-applying member, said other'pressure applying members also having pressing faces, means mounting said last-mentioned pressure applying members between said opposite lateral sides of the jaw assembly for movement relative to each other in the direction of move- .ment of the assembly, andvmeans embodied with said assembly for transmitting movement of one of said other 7 two pressure-applying members to the other one of said applying member located intermediate the opposite lateral ried by said assembly, one on each side of said first pressure applying member, said other pressure applying members also having exposed pressing faces disposed parallel V to the pressing face of said first pressure applying memtwo pressure applying members in response to engagement of said one pressure applying member with the container.

References Cited in the fileof this patent UNITED STATES PATENTS 1,397,409 Duwelius Nov. 5, 1921 1,421,673 Coates July 4, 1922 2,409,460 Waters Oct. 15, 1946 2,578,731 Nordquist et al. Dec. 18, 1951 2,612,821 Skay Oct. 7, 1952 2,658,415 Barowsky Nov. 10, 1953 2,737,090 Nordquist Mar. 6, 1956 2,753,861 Bode July 10, 1956 2,808,822 Celapino Oct. 8, 1957 FOREIGN PATENTS 165,454 Australia .4. Mar. 11, 1954 

